Eaton AT-1202, Installation Manual

Page: 42 / 82

PTO Switch
OEM ECU
TCM
Ve
h
ic
le
Co
nn
ec
to
r
Bo
d
y
Co
nn
ec
to
r
Ai r Ta n k
Ai r
S u pply
1. Re qu est f r om PTO Switch
to OEM ECU
3. TCM se nd s E n gage
message via J1939 to
OEM ECU
4. OEM ECU P r op r ieta r y
E n gage sig n al to the
Chassis Mo du le to act u ate
the PTO Ai r sole n oi d
PTO
11 12
J1939 PTO I n stallatio n
Mo du le
2. OEM ECU se nd s the
Re qu est message via J1939
to the TCM
J 1939 =
Batte r y Voltage =
G r o und =
Switche d G r o und =
Sole n oi d D r ive r =
Ai r S u pply =
6. J1939 Co n fi r m
message f r om
OEM ECU to TCM
to ope r ate PTO
5. PTO Co n fi r m to
OEM ECU
J1939 PTO Control
From To Description Notes
PTO Switch OEM ECU PTO Request Hardwired
OEM ECU TCM PTO Request J1939
TCM OEM ECU PTO Engage J1939
OEM ECU OEM Module PTO Engage J1939
OEM Module PTO Solenoid Solenoid PWR 12 Volt
PTO Solenoid Chassis GND Solenoid GND
PTO Confirm Switch OEM ECU PTO Confirm 5 Volt
PTO Confirm Switch Chassis GND PTO Confirm
39
PTO Interface